Ewan McGregor as Obi-Wan Kenobi. Obi-Wan is a General for the Galactic Republic and is a Jedi Master who sits on the Jedi Council. He often travels and performs missions with his best friend and former Padawan, Anakin.
Hayden Christensen as Anakin Skywalker/Darth Vader. Anakin has been recently promoted as the youngest ever Jedi Knight to join the council, but was denied the title of 'Master'. However, upon learning of his wife's pregnancy, he begins to have recurring visions of her dying in childbirth. Because similar visions accurately foretold the death of his mother, he swears to himself and his wife to do whatever it takes to stop this.
Natalie Portman as Senator Padmé Amidala. Padmé is Anakin's wife-in-secret; she has recently become pregnant with twins. As Senator of Naboo, she has taken a cautious look at the growing amount of power that is being given to the Supreme Chancellor and her husband's increasingly dark behavior.
Ian McDiarmid as Chancellor Palpatine/Darth Sidious. As the Supreme Chancellor of the Galactic Republic, Palpatine enacted the start of the Clone Wars against the Separatists. As a result, the Senate has voted him emergency powers and has recently been voting more and more to him. The Jedi Council oppose this, and begin to distrust him. The feeling is mutual for Palpatine, who only confides in Anakin Skywalker, in addition to being an unofficial mentor. In reality, Palpatine is the Dark Lord of the Sith, Darth Sidious, who finally steps from the shadows to exact the revenge of the Sith using the powers he has accumulated as the Supreme Chancellor to destroy the Jedi Order and the Republic it serves and lure Anakin to his side.
Frank Oz as the voice of Yoda. The wise old leader of the Jedi Council. He is a friend and mentor to many Jedi. He plays a major role in the Battle of Kashyyyk.
Samuel L. Jackson as Mace Windu. Windu is a Jedi Master who sits on the Jedi Council and is also a Jedi General in the Clone Wars.
Matthew Wood as the voice of General Grievous. Grievous is the evil General of the Separatists' droid army. The film's opening crawl reveals that he is the individual responsible for kidnapping Palpatine. He answers only to Count Dooku (who he knows as Darth Tyranus) and his master, Darth Sidious.
Jimmy Smits as Senator Bail Organa. Organa is a Senator in the Galactic Republic and friend to the Jedi, who grows concerned at the growing power of the Chancellor.
Anthony Daniels as C-3PO. C-3PO is Padmé Amidala's personal protocol droid created by Anakin Skywalker.
Kenny Baker as R2-D2. R2-D2 is Anakin Skywalker's astro-droid and good friend and C-3PO's counterpart.
Silas Carson as Nute Gunray & Ki-Adi-Mundi. Gunray is the Viceroy of the Trade Federation, who is at odds with Grievous and dares to question his leadership.
Temuera Morrison as Commander Cody and other clone troopers. Cody and the clone troopers are part of the army for the Republic. As seen in Attack of the Clones, they are the clones of the bounty hunter Jango Fett.
Christopher Lee as Count Dooku/Darth Tyranus. He is a Sith apprentice to Darth Sidious, Leader of the Separatists, and Grievous' superior, and together they kidnap Palpatine.
Peter Mayhew as Chewbacca. Chewbacca is a Wookiee who is friends with Yoda, and fights alongside him in the Battle of Kashyyyk
A long time ago, in a galaxy far, far away…. Sometime during Star Wars: Episode III Revenge of the Sith, Jedi Knight Anakin Skywalker will make a fateful decision. Faced with a choice between losing the one he loves or giving up his soul to gain the power to save her, Anakin will fall prey to the seductive temptations of the dark side of the Force. Just what Anakin's decision is, why he makes it and how it leads him to don a frightening suit of black armor have been the stuff of Star Wars legend